Formation of High-Angle Dislocation Boundaries in Drawn Single Crystal Copper Wires

Abstract

The formation mechanism of the high angle boundaries in drawn single crystal copper wires was investigated using electron backscattering diffraction. Two stages for formation of high angle boundaries were found: at low strains, the high angle boundaries correspond to the boundaries between different fiber texture components referred to the drawn direction of wires while the high angle boundaries start to present within one fiber texture at high strains. The critical strain for the two-stage transformation depends on the initial orientations parallel to axis direction of single crystal wires. Such difference in formation of high angle boundaries with increasing strain is associated with the deformation homogeneity.